i use clean sketchup version without plugins
and as you say its only occurs when I click in the textbox (i need to naming all groups and components)

problem is:
After creating and naming new group next selected object also renamed to name of new group (if new group created without name - selected object also renamed to "empty").
Here a video of
[flash=640,385:f4uz2wxp]http://www.youtube.com/v/MrrRqiDuHY4&hl=ru_RU&fs=1&rel=0[/flash:f4uz2wxp]
Is a BUG or FEATURE?